A communication device comprising at least a receiver and a demodulator. The receiver receives first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame. The demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being demodulates the first receiving signals.
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1. A communication device comprising: a receiver configured to receive first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame; and a demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being configured to demodulate the first receiving signals, wherein the first receiving signals are different signals from the second receiving signals.
A communication device receives two signals (first and second) transmitted over overlapping subcarriers. The first signal uses a set of two or more continuous subcarriers, and the second signal also uses a set of two or more continuous subcarriers. At least part of the subcarriers used by the second signal overlap with the subcarriers used by the first signal within a specific time frame. A demodulator then detects the second signal from the combined received signals, focusing on the overlapping subcarriers. Finally, the demodulator also demodulates the first signal. The first and second signals contain different data.
2. The communication device according to claim 1 , wherein the receiver comprises one or more antennas, wherein the number of the one or more antennas is less than the number of the receiving signals in the time frame.
The communication device from the previous description includes a receiver with one or more antennas. The number of antennas is less than the total number of signals (first and second) received in the same time frame. Therefore, the device is able to receive and separate the first and second signals using fewer antennas than signals received.
3. The communication device according to claim 1 , wherein the demodulator is configured to demodulate information using repeated operations.
The communication device from the first description includes a demodulator that demodulates information from the signals using repeated operations. This repeated operation could be an iterative decoding process to improve the reliability of demodulating the signals received on overlapping subcarriers.
4. The communication device according to claim 1 , wherein the number of the one or more subcarriers as the overlapping subcarriers is set for each time frame.
The communication device from the first description adjusts the number of overlapping subcarriers used for the first and second signals on a per-time-frame basis. This means the system dynamically configures how much the subcarrier sets overlap between the two signals for each transmission time interval.
5. A communication method for a communication device, the communication method comprising: receiving first receiving signals and second receiving signals, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame; detecting the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being configured to demodulate the first receiving signals; and demodulating the first receiving signals; wherein the first receiving signals are different signals from the second receiving signals.
A communication method for a communication device involves receiving two signals (first and second) that occupy overlapping subcarriers. The first signal is allocated to a set of two or more continuous subcarriers, and the second signal is also allocated to a set of two or more continuous subcarriers. The subcarrier sets of the two signals are at least partially overlapping in a time frame. The method detects the second signal from the combined received signals by focusing on the overlapping subcarriers. The first signal is then demodulated. The first and second signals contain different data.
6. A base station device comprising: a receiver configured to receive first receiving signals transmitted by a first communication device and second receiving signals transmitted by a second communication device, wherein the first receiving signals are allocated to a first set of subcarriers composed of two or more continuous subcarriers, the second receiving signals are allocated to a second set of subcarriers composed of two or more continuous subcarriers, and at least a portion of the second set of subcarriers overlaps a portion of the first set of subcarriers in a time frame; and a demodulator configured to detect the second receiving signals transmitted using one or more subcarriers from receiving signals including the first receiving signals and the second receiving signals, wherein the one or more subcarriers are subcarriers such that the first set of subcarriers overlap the second set of subcarriers, and the demodulator being configured to demodulate information indicating bits included in the first receiving signals, wherein the first receiving signals are different signals from the second receiving signals.
A base station receives two signals (first and second) from two different communication devices. The first signal is allocated to a set of two or more continuous subcarriers, and the second signal is allocated to a set of two or more continuous subcarriers. The subcarrier sets of the two signals are at least partially overlapping in a time frame. A demodulator detects the second signal by analyzing the overlapping subcarriers present in the combined received signals. The demodulator also demodulates information related to bits included in the first signal. The first and second signals contain different data.
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February 16, 2016
April 18, 2017
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